I am a little embarrassed to say that we came in here in the dark, using only a hand drawn chart that I had recreated from the description in the pilot books.

We could either stay out all night or ease our way in very carefully watching depth and lights.

The pilot book described a reef (for example)so many cables SSE by 1/4 E from the light, which I then drew on my paper chart.

I was horrified the next morning, looking down at the port from a skyscraper in the city, to see the huge breakwater that had been built on the reef at the entrance to the harbour. We had been completely unaware of this during our entry the night before.